In 2006, LEGO released 23 Racers sets across 4 subthemes, all of these sets have been retired. Subthemes for that year included Ferrari, Outdoor RC, Power Racers, and Tiny Turbos. For that year, the total price of all retail sets cost $687, today those sets are valued around $3,459, a growth of 404%.
Most valuable 2006 LEGO Racers set
8369-2 Dirt Crusher RC $929.42
Largest 2006 LEGO Racers set
8674 Ferrari F1 Racer 1:8 1,246 pieces
Most owned 2006 Racers set
8671 Ferrari 430 Spider 1:17
23 sets

4947 Yellow Sports Car

Theme / Subtheme Racers / Tiny Turbos
Year 2006
Pieces 28
Availability Retired
4947 LEGO Tiny Turbos Yellow Sports Car
promotional
Value $18.20
Annual growth 7.6%

4948 Red Racer

Theme / Subtheme Racers / Tiny Turbos
Year 2006
Pieces 22
Availability Retired
4948 LEGO Tiny Turbos Red Racer
promotional
Value $8.31
Annual growth 6.7%

4949 Blue Buggy

Theme / Subtheme Racers / Tiny Turbos
Year 2006
Pieces 24
Availability Retired
4949 LEGO Tiny Turbos Blue Buggy
promotional
Value $59.31
Annual growth 13.2%

6111 Street Race 4-in-1

Theme / Subtheme Racers / Tiny Turbos
Year 2006
Pieces 198
Availability Retired
6111 LEGO Tiny Turbos Street Race 4-in-1
Retail $12.99
Value $43.82
Growth  +237.3%
Annual growth 4.2%

8369-2 Dirt Crusher RC

Theme / Subtheme Racers / Outdoor RC
Year 2006
Pieces 88
Availability Retired
8369-2 LEGO Outdoor RC Dirt Crusher RC
Retail $39.99
Value $929.42
Growth  +2224.1%
Annual growth 7.0%

8661 Carbon Star

Theme / Subtheme Racers / Tiny Turbos
Year 2006
Pieces 44
Availability Retired
8661 LEGO Tiny Turbos Carbon Star
Retail $3.99
Value $10.33
Growth  +158.9%
Annual growth 5.1%

8662 Blue Renegade

Theme / Subtheme Racers / Tiny Turbos
Year 2006
Pieces 49
Availability Retired
8662 LEGO Tiny Turbos Blue Renegade
Retail $3.99
Value $46.31
Growth  +1060.7%
Annual growth 13.8%

8663 Fat Trax

Theme / Subtheme Racers / Tiny Turbos
Year 2006
Pieces 42
Availability Retired
8663 LEGO Tiny Turbos Fat Trax
Retail $3.99
Value $15.25
Growth  +282.2%
Annual growth 8.0%

8664 Road Hero

Theme / Subtheme Racers / Tiny Turbos
Year 2006
Pieces 55
Availability Retired
8664 LEGO Tiny Turbos Road Hero
Retail $3.99
Value $16.72
Growth  +319.0%
Annual growth 6.0%

8665 Highway Enforcer

Theme / Subtheme Racers / Tiny Turbos
Year 2006
Pieces 52
Availability Retired
8665 LEGO Tiny Turbos Highway Enforcer
Retail $3.99
Value $22.79
Growth  +471.2%
Annual growth 5.7%

8666 Tuner X

Theme / Subtheme Racers / Tiny Turbos
Year 2006
Pieces 61
Availability Retired
8666 LEGO Tiny Turbos Tuner X
Retail $3.99
Value $12.62
Growth  +216.3%
Annual growth 8.9%

8667 Action Wheeler

Theme / Subtheme Racers / Power Racers
Year 2006
Pieces 79
Availability Retired
8667 LEGO Power Racers Action Wheeler
Retail $9.99
Value $17.03
Growth  +70.5%
Annual growth 2.8%

8668 Side Rider

Theme / Subtheme Racers / Power Racers
Year 2006
Pieces 111
Availability Retired
8668 LEGO Power Racers Side Rider
Retail $9.99
Value $17.36
Growth  +73.8%
Annual growth 3.8%

8669 Fire Spinner

Theme / Subtheme Racers / Power Racers
Year 2006
Pieces 113
Availability Retired
8669 LEGO Power Racers Fire Spinner
Retail $9.99
Value $27.90
Growth  +179.3%
Annual growth 5.5%

8670 Jump Master

Theme / Subtheme Racers / Power Racers
Year 2006
Pieces 105
Availability Retired
8670 LEGO Power Racers Jump Master
Retail $9.99
Value $19.65
Growth  +96.7%
Annual growth 6.7%

8671 Ferrari 430 Spider 1:17

Theme / Subtheme Racers / Ferrari
Year 2006
Pieces 559
Availability Retired
8671 LEGO Ferrari 430 Spider 1:17
Retail $39.99
Value $217.14
Growth  +443.0%
Annual growth 6.2%

8672 Ferrari Finish Line

Theme / Subtheme Racers / Ferrari
Year 2006
Pieces / Minifigs 573 / 10
Availability Retired
8672 LEGO Ferrari Finish Line
Retail $59.99
Value $284.21
Growth  +373.8%
Annual growth 5.4%

8673 Ferrari F1 Fuel Stop

Theme / Subtheme Racers / Ferrari
Year 2006
Pieces / Minifigs 189 / 5
Availability Retired
8673 LEGO Ferrari F1 Fuel Stop
Retail $19.99
Value $150.00
Growth  +650.4%
Annual growth 8.7%

8674 Ferrari F1 Racer 1:8

Theme / Subtheme Racers / Ferrari
Year 2006
Pieces 1,246
Availability Retired
8674 LEGO Ferrari F1 Racer 1:8
Retail $139.99
Value $798.99
Growth  +470.7%
Annual growth 6.9%

8675 Outdoor Challenger

Theme / Subtheme Racers / Outdoor RC
Year 2006
Pieces 104
Availability Retired
8675 LEGO Outdoor RC Outdoor Challenger
Retail $159.99
Value $299.99
Growth  +87.5%
Annual growth 3.7%

8676 Sunset Cruiser

Theme / Subtheme Racers / Outdoor RC
Year 2006
Pieces 58
Availability Retired
8676 LEGO Outdoor RC Sunset Cruiser
Retail $59.99
Value $143.88
Growth  +139.8%
Annual growth 3.3%

8681 Tuner Garage

Theme / Subtheme Racers / Tiny Turbos
Year 2006
Pieces 652
Availability Retired
8681 LEGO Tiny Turbos Tuner Garage
Retail $39.99
Value $172.76
Growth  +332.0%
Annual growth 4.3%

8682 Nitro Intimidator

Theme / Subtheme Racers / Power Racers
Year 2006
Pieces 724
Availability Retired
8682 LEGO Power Racers Nitro Intimidator
Retail $49.99
Value $127.18
Growth  +154.4%
Annual growth 4.1%